Show fixed arrow for uber tray bubble if shelf alignment is vertical.

ash/system/tray/system_tray_bubble.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/system/tray/system_tray_bubble.h"
 
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/system/tray/system_tray.h"
 #include "ash/system/tray/system_tray_delegate.h"
@@ skipping 25 matching lines @@
 const int kShadowThickness = 4;
 
 const int kBottomLineHeight = 1;
 
 const int kSystemTrayBubbleHorizontalInset = 1;
 const int kSystemTrayBubbleVerticalInset = 1;
 
 const int kArrowHeight = 10;
 const int kArrowWidth = 20;
 const int kArrowPaddingFromRight = 20;
+const int kArrowPaddingFromBottom = 17;
 const int kMinArrowOffset = 12;
 
 const int kAnimationDurationForPopupMS = 200;
 
 const SkColor kShadowColor = SkColorSetARGB(0xff, 0, 0, 0);
 
 void DrawBlurredShadowAroundView(gfx::Canvas* canvas,
                                  int top,
                                  int bottom,
                                  int width,
@@ skipping 287 matching lines @@
     host_->StopAutoCloseTimer();
 }
 
 void SystemTrayBubbleView::OnMouseExited(const views::MouseEvent& event) {
   if (host_)
     host_->RestartAutoCloseTimer();
 }
 
 // SystemTrayBubble::InitParams
 SystemTrayBubble::InitParams::InitParams(
-    SystemTrayBubble::AnchorType anchor_type)
+    SystemTrayBubble::AnchorType anchor_type,
+    ShelfAlignment shelf_alignment)
     : anchor(NULL),
       anchor_type(anchor_type),
       can_activate(false),
       login_status(ash::user::LOGGED_IN_NONE),
-      arrow_offset(kArrowPaddingFromRight + kArrowWidth / 2) {
+      arrow_offset(
+          (shelf_alignment == SHELF_ALIGNMENT_BOTTOM ?
+               kArrowPaddingFromRight : kArrowPaddingFromBottom)
+          + kArrowWidth / 2) {
 }
 
 // SystemTrayBubble
 
 SystemTrayBubble::SystemTrayBubble(
     ash::SystemTray* tray,
     const std::vector<ash::SystemTrayItem*>& items,
     BubbleType bubble_type)
     : tray_(tray),
       bubble_view_(NULL),
@@ skipping 206 matching lines @@
 void SystemTrayBubble::OnWidgetVisibilityChanged(views::Widget* widget,
                                                  bool visible) {
   if (!visible)
     MessageLoopForUI::current()->RemoveObserver(this);
   else
     MessageLoopForUI::current()->AddObserver(this);
 }
 
 }  // namespace internal
 }  // namespace ash